Size(in L x W x H): 33cm (13") x 28cm(11") x 81cm(32") Working Specification: Noiseless 1/8 Th. HP 2800 RPM compressor. Bottle capacity 1.5 liter each. Outer Body 21 SWG. MS Material Pre-treated In Seven Tanks chemical process & epoxy powder coated, which it makes uncorrosive Medical Equipment / Medical Furniture. Options: All powder coated All stainless steel